R 如何在PackageStatus()中列出&q；不可用的包&q；

如packageStatus() docs所示，它返回一个包含两个组件的列表.我们感兴趣的是inst:

以列为矩阵的数据帧，由installed.packages加"Status"返回，为levels c("ok", "upgrade", "unavailable")的因子.

下面是一个提取它的函数:

get_packages_with_status <- function(status = "unavailable", names_only = TRUE, ...) {
    pkgs <- packageStatus(...)
    tbl <- pkgs$inst[pkgs$inst$Status == status, ]
    if (names_only) {
        return(unname(tbl$Package))
    }
    tbl
}

输出应如下所示:

get_packages_with_status()
#  [1] "assertive"            "assertive.code"       "assertive.data"       "assertive.data.uk"    "assertive.data.us"    "assertive.datetimes" 
#  [7] "assertive.properties" "assertive.reflection" "assertive.strings"    "assertive.types"      "BiocGenerics"         "BiocVersion"         
# [13] "cqcapi"               "cqcrequests"          "echarts4r.maps"       "estimability"         "geojsonlint"          "getnews"             
# [19] "graph"                "hexjsonwidget"        "maptools"             "optiRum"              "pwrcalc"              "rgdal"               

如果您想要完整的数据框.

get_packages_with_status(names_only = FALSE)
#                                   Package                                     LibPath    Version Priority                                         Depends
# assertive                       assertive /home/sam/R/x86_64-pc-linux-gnu-library/4.2      0.3-6     <NA>                                    R (>= 3.0.0)
# assertive.code             assertive.code /home/sam/R/x86_64-pc-linux-gnu-library/4.2      0.0-3     <NA>                                    R (>= 3.0.0)
# assertive.data             assertive.data /home/sam/R/x86_64-pc-linux-gnu-library/4.2      0.0-3     <NA>                                    R (>= 3.0.0)
# assertive.data.uk       assertive.data.uk /home/sam/R/x86_64-pc-linux-gnu-library/4.2      0.0-2     <NA>                                    R (>= 3.0.0)
# assertive.data.us       assertive.data.us /home/sam/R/x86_64-pc-linux-gnu-library/4.2      0.0-2     <NA>                                    R (>= 3.0.0)
# assertive.datetimes   assertive.datetimes /home/sam/R/x86_64-pc-linux-gnu-library/4.2      0.0-3     <NA>                                    R (>= 3.0.0)
# assertive.properties assertive.properties /home/sam/R/x86_64-pc-linux-gnu-library/4.2      0.0-5     <NA>                                    R (>= 3.0.0)
# assertive.reflection assertive.reflection /home/sam/R/x86_64-pc-linux-gnu-library/4.2      0.0-5     <NA>                                    R (>= 3.0.0)
# <etc>

另请注意，可用的定义取决于您为repositories提供的参数:

描述R程序包资料库在Internet或本地计算机上的位置的URL的字符矢量.如果指定为空，则从选项"repos"派生相应的URL.

这就是为什么，正如MrFlick的comment所指出的那样，在我的列表中，我可以看到列出为不可用的软件包，即使我知道它们已经安装，因为它们是从GitHub或本地安装的.